Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Sep 7 16:46:05 2026 Auto Mode Machine = Linux oleg220-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg220-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 5505 13766 610350 131986 64 8 7203 20201 780776 1124074 64 16 7964 27504 1204796 913649 64 32 8437 63372 1049372 1363961 64 64 4114 58180 1279447 1304314 128 4 6812 11661 526961 514339 128 8 12716 22833 309113 470606 128 16 10287 33437 1057236 809997 128 32 14121 80662 463696 1185654 128 64 12650 99002 97192 1319723 128 128 15998 83070 1391557 1885042 256 4 8102 11596 627623 509895 256 8 12637 21698 592636 705107 256 16 13322 22061 1103757 684432 256 32 29533 81530 924200 482189 256 64 21169 67421 1430119 1306564 256 128 25561 104147 1497953 1600674 256 256 27441 93573 1230218 2097948 512 4 3735 5295 231789 497585 512 8 16575 23475 846530 1132755 512 16 39594 44885 603767 901241 512 32 26542 59109 1264113 973559 512 64 35935 69453 1402845 1236455 512 128 40346 73794 275537 312415 512 256 11745 49882 1650887 753025 512 512 22490 124119 1829505 2225819 1024 4 11054 5844 675011 284137 1024 8 10733 20929 568884 502935 1024 16 19219 25626 423157 532226 1024 32 27595 40857 702388 285782 1024 64 39386 52545 540328 1204487 1024 128 42317 50525 164767 1484193 1024 256 35354 113687 513272 890553 1024 512 42364 99582 1322828 1641301 2048 4 8968 12997 420790 299115 2048 8 13580 12794 845232 450896 2048 16 22191 24487 784697 538695 2048 32 18288 33018 371154 418127 2048 64 42452 62856 1011794 636819 2048 128 74044 141554 1472440 1825003 2048 256 45865 62162 430167 1397008 2048 512 46166 81318 1751687 1009297 4096 4 8023 9948 262850 236163 4096 8 12384 13413 153327 347800 4096 16 14922 26145 669055 576238 4096 32 24916 40722 1221218 903784 4096 64 27560 53602 1342092 593538 4096 128 30718 46155 612259 546871 4096 256 40122 51944 1013154 1254847 4096 512 42267 63787 992952 826002 8192 4 9680 10480 228673 262641 8192 8 12035 12840 373431 484787 8192 16 16850 17335 474046 377426 8192 32 22550 24169 482961 581739 8192 64 21437 29127 452323 645401 8192 128 29503 53284 981656 517693 8192 256 32110 64676 884106 493938 8192 512 33799 63147 356281 814312 16384 4 7933 8320 388237 311684 16384 8 15094 15490 565202 435385 16384 16 21586 27459 699785 589119 16384 32 26266 30103 659712 743944 16384 64 34270 38339 690815 626300 16384 128 30765 55184 1345598 1037481 16384 256 41132 50749 683749 466756 16384 512 39340 89876 807763 1065983 32768 4 9851 9791 263084 249446 32768 8 13054 18453 435564 643215 32768 16 24429 26956 556494 664329 32768 32 38108 40924 926096 683790 32768 64 39399 38489 907752 619315 32768 128 32669 51372 1151853 620394 32768 256 51424 60781 808408 689124 32768 512 45925 51972 1261372 771956 65536 4